Kenwood TS-670 Service Manual page 9

~
~
~
~
~
~
~
TS-670
CIRCUITDESCRIPTION
PORT 2 LATCH
(LOW 41 AND
EXPANDER
PORT I/O
PORT 2 LATCH
(HIGH 4)
2
RESIDENT
ROM
2Kx8
HIGH PROGRAM
COUNTER
8
VDD
j
-
PROGRAM SUPPLY
POWER VCC
SUPPLY
-
+ 5 (LOW POWER
VSS STAND8Y)
-GND
CONTROL AND TIMING
INITIALIZE
CPU/
PROM/ MEMORY
EXPANDER SEPARATE
STROBE
CONDITIONAL
BRANCH
LOGIC
181
PORT 1
BUS
BUFFER
AND
LATCH
8
TEST
0
REGISTER
0
REGISTER 1
REGISTER 2
REGISTER 3
REGISTER 4
REGISTER 5
REGISTER 6
REGISTER 7
8 LEVEL STACK
(VARIABLE LENGTH)
OPTIONAL SECOND
REGISTER BANK
TEST 1
INT
FLAG 0
FLAG 1
UJ
0
0
~
0
TIMER FLAG
CARRY
ACC
DA T A STORE
ACC BIT TEST
RESIDENT
RAM ARRAY
128xB
JLPD8049HC-092/TM8049P-3034 Block diagram
RIT encoder clock signal 1
count at L
TO
Xl
X3
40
VCC
~
5VDC
Tl 39 Main encoder clock signal
38 count at L
P27 37 TX-step signal ouptut
P26 Blanking output
RESET
INT
EA
P25
P24
P17
P16
DBl
DB2
External Date bus
DB3
DB4
DB5
DB6
P20
Tone output
Enable data for PLL
G3
G4
G5
G6
Digit ouptut
G7
GB
Gg
G10
5V
JLPD8049HC-092/TMP8049P-3034 Terminal name
9